Bad communication between Jigsaw and MIM-B19N (MODBUS SAMSUNG)

Jose Jiménez 2 months ago in Devices / Modbus updated by Jürgen Jürgenson 2 months ago 3

Hi everyone,

i have a jigsaw connected to a Modbus interface module MIM-B19N Samsung. I have the next parameters:

I attach the datasheet of this module to compare if you need:  Manual Interface MODBUS Maquinas clima Samsung.pdf

The question is that some times, randomly, the communication breaks down and we can control any of indoor units we have. In addition, i attach a screenshot of Jigsaw's logs:

I don't know if the problem is because of driver's parameters or firmware error. I will appreciate any help .


Have you tried setting the data format to big endian?

If i put Big endian, the data shows this:

Instead if i put little endian, the data shows correctly:

I don't understand why i can read this value (register 75) but i can control, for example, on/off unit (register 74)

Try to rise the command delay and read delay.